01 Knee
_..
patella: in front of knee. Knee cap
menisci: cushings
Bones
_..
where femur meets knee joint: 2 condyles
tibia also has condyles
tibial tuberosity: ligament attach to patella inserts here
Ligaments
_..
ACL
pull tibia forward in lower leg restricted
PCL
find patellar first
top bone: femur
bottom bone: tibia
left pic: black line attaching to anterior tibia (anterior cruciating)
right pic: black line attach to posterior tibia (posterior cruciating)
Collateral
_..
valgus: distal bone in joint moves away from midline. V for upside down V
MCL
LCL
does not attach to tibia but fibula
Menisci
_..
MRI: triangular black triangles on either side of knee
Injury
_..
ACL
_..
NFL football
ACL resists forward movement
PCL
_..
car crash, knee into dashboard, push lower leg backward
increased backward movement of the tibia against a fixed femur
MCL
_..
push knee medially or pull laterally
tackle in football or just twisted
test: passively move leg into valgus position: medial space widens
Unhappy Triad
_..
foot planted, someone wacks from side, pushes knee medially
LCL
_..
difficult to injure, need force on inside of knee
massive trauma that damages everything
Meniscus
_..
A meniscus injury typically shows a small joint effusion and crepitus, locking, or catching with range of motion.
Others
_..
joints often surrounded by bursa
slippery cushings
[_](baker's cyst cause, symptoms)..
any injury would cause cyst from communication of synovium and bursa
degenerative osteoarthritis, inflammatory arthritis
white
_..
Last updated
